Basic git/github Concepts for Newbies

Basic git/github Concepts for Newbies
(I am posting this mostly to review key concepts discussed on evening of May 29, 2013). This is a crosspost with RubyGirlsonRails) Repository (slang: Repo): Location on github that stores a snapshot of a project. It includes: snapshots of changes and commits in a history. Names of Repos: Upstream points to the source projects on ...